Machine for making asphaltic or similar mixtures.



APPL |CATION man APR. 6. 1914.

Patented Feb. 11, 191% 4 SHEETSSHEEI l.

N.. M. ROSENDAHL.

I MACHINE FOR MAKING ASPHAlTlC 0R SIMILAR MIXTURES. 1,293,937.

APPLICATION FILED APR. 6. I914 Patented Feb. 11, 1919 Q SHEETSSHEET 2.

N.'M. ROSENDAHL. MACHINE FOR MAKING ASPHALTIC 0R SIMILAR MIXTURES.

Patented Feb. 11, 1919.

4 SHEETS--SHEEI 3.

APPLICATION FILED APR. 6. um.

I m r I 'H niill 5 1 ftwwaewu.

N. M. ROSENDAHL. MACHINE FOR MAKING ASPHALTIC 0R SIMILAR MIXTURES. APPLICATION FILED APR. 6. I9I4.

Patented Feb. 11, 1919.

4 SHEETS-SHEE I 4.

' UNITED STATES PATENT cr mes.-

n'ILs 2M. nosEnDAHL, or wrn'rzznor HARBOR, ILLINOIS, nssrcnon TO rnnnnnrcx c.

AUSTIN, or CHICAGO, ILLINOIS. v

' MACHINE FOR MAKING ASPHALTIC on SIMILAR ivrxxrunns.

Specification of Letters Patent.

Patented Feb. 11,1919.-

' Application filed April 6, 1314. Serial N0. 829,748.

To all whom it may; concern:

Be it known that I, NrLs M. ROSENDAHL, a citizen of the United States of America, and resident. of Winthrop. Harbor, Lake county, Illinois, have invented a certain new and useful Improvement in Machines for Making Asphaltic or Similar Mixtures, of which the following is a specification.

My invention relates to machines for making asphaltic or other similar mixtures, and more particularly to machines of this kind which are of a portable nature, such as those employed in paving streets, and more especially to those which are provided with means for heating all of the materials be fore they are combined in the required pro-- portionsto form the desired mixture.

Generally stated, the object of my invention is to provide a novel and highly ellicient machine of this general character, having the elements thereof constructed and arranged in a more compact and satisfactory manner than heretofore.

Special objects are to provide a better and more efficient construction and arrangement of the apparatus for heating the sand, crushed rock, ravel or other loose materials ordinarily "employed in the making of asphaltic mixtures of this character; to provide. in conjunction with the means for heating the asphalt and other materials, a." novel and ciiicient form of device tor thoroughly mixing or combining said materials;

to provide an improved constructix'in and arrangen'ient for transferring the loose materials from the heating apparatus to the mixingdevice, of such character that the mate als discharged from said apparatus may be rcturnci'l thereto, if not properly heated or dried. or if the mixing device is in operation and requires more time in which to mix the batch; to provide a novel construction and arrangen'ient wherxiiby the heated air and hot gases are taken through the said apparatus. by a suction fan or blower. tor the purpose of drawing of? the dust and moisture. thereby leavinggtl'lo said. loose materials in perfectly dry and dustlcss condition: and to provide certain details and combinations and features of construction tendingito increase the general efficiency and desirability oli a preparing and mixingmachine of this particular charactor.

To these and other useful ends my im'rm ,a side elevation of a preparing and mixing machine embodying the principles of my invention, showing the same more or less in longitudinal section.

in Fig. 1. K

Fig. i is. a transverse section on line 4% in Fig. 2.

Fig. 5 is a transverse section on line 5-5 in Fig. 2.

Fig. 6 is a detail section, on a larger scale,- on line 6-6 in Fig. 2, illustrating the con struction of the mixing device, and showmg certain portions thereof broken away for convenience of illustration.

Fig. 7 is an end view of the structure shown in Fig. (5, showing the same partially in transverse section, and illustrating the rack and pinion mechanism by which the mixingreceptacle is tilted into dumping position upon the completion of the batch of mixture.

Fig.8 is a section on line 8-8 in Fig. (l.

9 is a detail view showing the ar rangement whereby steam or other fluid pressure is cn'iploycd for transferring the semi-liquid or melted asphalt from the tool-z or reservoir to the mixing receptacle.

As thus illustrated. my invention con prises a. body or platform supported on Wheels l of any suitable character, the umchine being of a portable nature and adaptcd to be drawn from place to place. The asphalt'is contained in a tank or reservoir which is suitably supported on the said plaitorm or body, and the lower sin-taro of Which is formed by a concavowall c. whcrcby a space 6' is formed below. In this space an outer cylinder D is disposed in horizontal position. lacing providml at one end with a, flange, II which trav is on rollers n". and -ll its other end with a similar flange (I which travels on rollers (i \vhcrcbyfsaid ovliiulcr may be rotated about a horizontal axis. For this purpose the receiving cnd of said cylinder is provided with gear teeth Z Fig.

which engage a driving pinion n operated.

Fig. 3 is a transverse section on line 38 the cylinderF movementof the materials,

shown and described, the length of the lnamg a receiving end portion 7' into which ing of 'neotion therewith.

per. Ahousing K is disposed and with space between, being secured at one end to the discharge end of the cylinder D, and the cylinder G being secured at its opposite D, concentricallv end to the receiving end of the cylinder D,-

in-the manner shown more clearly in Fig. 2. The loose materials such. as sand, crushed rock or gravel are discharged from'the. spout H through the inlet opening d and into the end of the innermost cylinder G, which latter is provided internally with obliquely arranged blades 9' that serve to gradually move the materials tothe right and discharge them from the other end of said cylinder. The cylinder F is provided internally with similar blades f, but as these are disposed at a diii'erent angle, the materials now move to the left in the rotating cylinder F and are discharged from the end thereofn The cylinder D is provided inter:

nally with blades d disposed at the same angle as the bladesv 9, whereby the materials are caused to move to the right in this cylh inder, and are finallydischarged from the" 25 openings d in the end of said outer cylinder. .These cylinders, and also the asphalt tank or. reservoir above, are heated by gas.

burners I, of any suitable character, disposed below the said cylinders. With this construction and arrangement, the loose materials, such as sand, crushed rock or gravel,

are caused to moveback and forth, from 7 one cylinder to the other, and are not allowe to escape until they are thoroughly heated and dried, By this back and forth in the manner chine is considerably reduced, notwithstandingthe fact that the amount of travel these materials are compelledto undergo is actually of some distance and entirely sufficient for insuring properheating and drythe materials before Figs. 1 and 3 show the means for conveymaterials to the spout H. the construction and operation thereof being as follows:- The spout H forms an outlet for the bottom of the hopper 7t and is provided with a controlling 'valve 7L which is opened and closed by a handle if having suitable con- A vertically disposed conveyer or elevator J is disposed at one side of said hopper, has its upper end connected thereto by a spout, j, the lower end of said elevator havthe sand or other inaterialis sh veled. This elevator can be of any suitable character, such as those shown in Fig.4, and serves to carry the sand or other materials upward to the spout j 'from which latter the said materials are then discharged into between the they are, d i scharged from the last cylinder or drum."

as shown in Fig. 3, and 7 said hop v.10 or blowerJc operwhereby the heated air and hot gasesproduced by; the:

" burners I are drawn through i and into said housing K and then discharged by said fan or blower into This, it will be understood, all of the dust and moisture serves to raw.

tions are as follows -A' measuring recep tacle L is disposed above the mixing receptacle M,'w'ithin the housing N, and these are constructed and operated in the. followin manner -Said receptacle L side provided with an inlet opening Z, ahd has' its ends provided with trunnions l of any suitable 'eharacter, supported on horizontal bars Z and a handle Z is applied to" the cylinars the atmospi'ere-,

from the'inte- ,rlor of the cylinders, leaving the sand or in a highly heated and proper or desired proporhas its upper I one end of this tilting or oscillating recep" -tacle. .The'recIept-acle M is also supportedin trunnion bearings m and m as shown in Fig. 6, being provided at one end with a pinion m which isengaged by a whereby said receptacle may be tlltL a horizontal axis to dump or batch of mixture. provided with. double walls providing a space m to, which steam is admitted through discharge the the hub openings m from the supply pipem, or in any other suitable manner. The rotary shaftm" extends through the trunnions'of said receptacle, "thereby, and is provided with radially-extending long and short blades m?v it being observed that these V blades are disposed in pairs, each pair being formed by ck W, about The said receptacle isbeing supported Y and m,

along and short blade, and the mom each pair extending radiall at opposite sides ofthe shaft. It wil also seen that the members of each arranged at an angle an a same oblique plane, whereby the which form a pair operate in rections-that is to say, one bla e pushes the materials along the shaft in one direction, like the blade of a propeller wheel, and .the other blade of the same pair'pushes the materials along the shaft in the opposite direction. In this "way, and by reason of the difference in length of the members of each pair of blades, a peculiar effect is produced on the melted asphalt in the receptacle M, and on the combined therewith, the general being (pair 0i, blades are two blades op osite'. di-

a very chewing up 11s (lien mad in the other materials to be mixing together of the different materialsthat is to say, the blades out the mass here and, there and turn it over, so to speak. and in this Way efi'eet a very thorough and even mixing together of the different materials. It will he understood that the shaft n can be rotated by anysuitable means.

The asphalt is conducted from the tank or reservoir through a pipe or pipes to the receptacle M in any sultable manner. For example, and with a View to avoiding the use of pumps for this urpose, the asphalt can be conducted from the reservoir through a pipe 0 to a small trap or reservoir P, and then through a pipep to said mixing recepmole; and after the said, trap or reservoir P is full, or after it contains the required amount, a three-way valve 0. of any suitable character. disposed in the pipe 0 can then he turned to shut off the flow of asphalh and to admit t am from the pipe 0 and the steam pressure thus admitted to the top of the trap or re ervoir P then forces the contents thereof into the pipe 71 and from there into the mixi215: receptacle.

asphalt hot and '54 Thus the steam keeps the in flowing condition and the same along t the point where the "a ure is to be effected. 'lhe means for transferring the loose maas from the heating apparatus. at'tcr the me are discharged from the openings I OllOWSZ-A chute or spout Q. receives aid materials and conveys them to the r end of the elevator or vertically, dis- .o el'invever ll and from the top ot the alm the nuitel'luls are ihen discharged into i stow: e chandler S having a sloping hoti a by which the materials are then eon l through a. bottom opening to the lower ot' the similar elevator T. which latter lH-i its upper end provided with a spout r whereby the materials are th n finally discharged into the measuring receptacle L. which latter is then tilted over to disrharjlo its contents into the mixing recepta le heiovv. It. will he soon, however. that a valve F is provided near the top of the elevator R.

that by moving this valve into the pom shown in dotted lines in Fig". l by any suitable operating" means, the materials will then he dclicrted into the spout or chute- V which leads to the inlet opcnin W of the ivliuder l whereby the materials are returned for further treatment in the rotating drums or cylinders comprised in the heating and during apparatus. 'lhus. and in this way, the loose maieri; is can he diverted hack the said apparatus" if found to he not :'o;. i'l v heated or dried. or it the mini)" oicle M is tall and more timeis rei for mixing the iiateln or ifthe storage oamlirr is full. Thisfit will he seen. is ac:- romplished without stopping; the rotation of the rvlindcrs D. l" and (i and without stopping the operation of the elevators R and T,

storage chamber the preparing and ang ng apparatus being permitted to run eipitmuously and ultiiont interruption. While the materials are passing through chute to the rotary drier, the

' S inay he feeding its con- 7e tents to the lower ehd of elevator T, so that themixingr operatioh will not he interrupted. When the elevator fl is stopped after the measuring receptacle is filled. the elevator continues to discharge into said storage 75 chamber. As this chamber S is close to the heat, the materials therein are kept hot.

From the foregoing it will be seen that I provide a preparin iainl mixing;- iarhine in which the various elements and instrumenso talities are very compact and ermvenicntly arranged. the uniterilils' heing given the desired amount of trclu'ment, while passing through the heated area. without the necessity of undesirably lengthening the machine. 85 It will also be seen thl t means are provided for eflicientlv and properly ronihiniug the materials. it being understood that. the skill and judgment of the operator Wlll li e exercised more or l in the running" of the ma- 9 chine. For example, and with respectto the most ciiiricnt operation of the blades in the reccptarlc Ill. the lattcizshould. be filled to a point a little abhve the shaft m in order to obtain the best result. As to the propcr heating and drying." of the loose inatcrials. the operator orf attendant will ob serve the same. as they are discharged from the rotary heating" apparatusi and will guide them into the mixing mar t me or hack into Fro the said apparatus depen urgupon their condition. The drier is rovered by my car pending application Serial No. RTQt-l-'.

lVhat l claim as my invention l. A. marhino for makin i i V 11oz iurcs. eomprisinil' means for l l= phalt or simil r suhstanre. appar Us where-- by the same heat is employed ii liilf-llillf the temperature of the other or loo mate rials. surh as sand. rvushed reel-r or gravel. ill

instrmnentalit s fo combining said mate-- rials in the desired pr portions and having devices for mixing and diselnu'ginsr the same in batches. means to feed the asphalt to said devices, an rlevator and a hopper {or leeo u r i! the materials to said apparatus. an elevator for raising the materials 1! paratus. and said instrumcm. provisions \vl: rt-l1 the loose mat-oi" returned to said apparatum if uoecs.

(olive-3rd to said. do A machine for nu. tures. cfiillpl'lf- 11;; means phal'i or similar suhstain by the same heat is 2 mph temperature the o mor loose i surh as s nd. erusl'h in-eptalities for com "the desired propo for mixing and I and having devices for m1,

batches, means to feed the asphalt to said devices a'pair of elevators for transferring the loose materials from said apparatus to said devices, the first elevator delivering from its upper end to the lower end of the second elevator, and means for cutting out the second elevator to return the loose materials to said apparatus "from the upperend of said first elevator.

3. A machine for making asphaltic mixtures, comprising means for heating the as phalt or similarhsulostance, appa atus where by the same heat is employed for raising the temperature of the other or loose materials,

such as sand, crushed rocl; .or gravel, instrumentahties for combining said mater eds 111 rock or gravel, and instrumentahties for the desired proportions and having devices for mixing and discharging the same in batches, means to feed the asphalt to said devices, and means whereby the loose materials discharged from said apparatus are returned thereto, if necessary, without being mixed with the asphalt, said apparatus having an inlet atits discharge end for receiving the returned materials.

4. A machine for making asphaitic mix tures, comprising means for heating the as phalt or similar substance, a paratus whereby the same heat is employe for raising the temperature of the other or loose materials, such as sand, crushed rock or ravel, and in strumentalitles for combining said materials with the asphalt in the desired proportions and having de ices for mixing and dis charging the same in batches, means to feed the asphalt to said devices, said apparatus having axial inlet openings at both ends thereofand an outlet at onlyone end, means to carry the loose material. away from said outlet and hack tonne of said inlets, when necessary, thereby preventing the loose material from reaching the piece where the mixture is formed, and means subject to said heat to convey the materials from said up .paratus to said instru nentalities.

5. A machine for making asphaltic mixtures, comprising means for heating the asphalt or similar substance, ap 'mratus whereby the same heat is employed for raising the temperature of the other or loose materials, such as sand, crushed rock or ,ZiuVGl, instrumentalities for combining said materials with the asphalt 1n the desired proportions ring and discharging the same in hatches, means to feed the asphait to said devices, said devicesiuclud 193 a, mixing receptacle, means for heating means? said receptacle, means for feeding the as- 6. A machine for making asphaltic mixtures, comprising means for heating the asphalt or similar substance, apparatus Wherehy the same heat is employed for drying and raising the temperature of the other or loose materials, such as sand, crushed combining said materials with the asphalt in the desired proportions and having devices for mixing and discharging the same in batches, means to feed the asphalt to said devices, said devices including a batch mixing receptacle, and said machine having means whereby the loose dry materials dis-- charged from said apparatus are carried upward and then returned downward thereto if'not in r0ner condition or ifneees sary to give said receptmle' sufiicient time to nnx the hatch. I

7, A machine for making asphaltic mlxtures, comprising a drying apparatus, a;

mixer, an elevator for raising'the loose ma terials from said apparatus, a hopper for receiving the materials from'said apparatus and automatically feeding the same to the lower end of said elevator, a second elevator disposed at one side of said first elevator, a chamber forminga. hopper for receiving the materials from the top of said first elevator, said chamber being adapted to store a quantity of the materials and having a .bottom opening for feeding the materials to the a lower end of the 'second-elepator, means to return the materials to saidrapparatus when desired, spout leading from the top of said second elevator to the mixer, a spout leading I downward rom the top of said first elevator to said apparatus, and a valve to direct the materials either into said chamber or said last mentioned spout Signed by me at Chicago, 27th day of March, 1914-.

NIL-S M. ROSENDAHL.

Witnesses RACHEL- d RICHARDSON, An'ruon l DURAND.

Illinois, this 

